281807domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumbers k such that (5^k - 2^k)/3 is prime.at n=18A082182Largest prime < 10*a(n-1), a(1)=3.at n=5A124263Largest prime < 10*a(n-1), a(1)=29.at n=4A124310Prime numbersat n=24587